Cleanups needed for this-scoping in arrow functions

src/ia32/lithium-codegen-ia32.cc

Index: src/ia32/lithium-codegen-ia32.cc
diff --git a/src/ia32/lithium-codegen-ia32.cc b/src/ia32/lithium-codegen-ia32.cc
index 8dde18d2535aef1413fa3f26349d2fa69f264fbc..7a4e00fc3e64017ad140c6da609e9799b033ec56 100644
--- a/src/ia32/lithium-codegen-ia32.cc
+++ b/src/ia32/lithium-codegen-ia32.cc
@@ -142,7 +142,7 @@ bool LCodeGen::GeneratePrologue() {
     // global proxy when called as functions (without an explicit receiver
     // object).
     if (info_->this_has_uses() && is_sloppy(info_->language_mode()) &&
-        !info_->is_native()) {
+        !info_->is_native() && info_->scope()->has_this_declaration()) {
       Label ok;
       // +1 for return address.
       int receiver_offset = (scope()->num_parameters() + 1) * kPointerSize;